According to a poll conducted and paid for by Clarus Research Group, D.C. Mayor Adrian Fenty and his main challenger in the Democratic primary, Vincent Gray, are neck and neck. The poll found 39 percent of voters surveyed favored challenger Vincent Gray, while 36 percent favored Fenty. The difference between the two candidates is less than the poll's margin of error of plus or minus 4.4 percentage points. We guess you really can't count your chickens before they hatch. It looks like it's going to be a close one.